The victim was sleeping in her second-floor bedroom in Rosedale, Queens, with the window open when someone, possibly using a ladder, accessed her bedroom early Sunday, the New York Police Department told WPIX.

Her parents were not home at the time, but she was left in the care of several adult relatives, sources said.

When the child’s parents returned, she told them a stranger accessed her bedroom and assaulted her, according to police.

Doctors later found indications of sexual assault, sources told the station.

Investigators were able to lift fingerprints from a ladder and inside the house, as well as locate surveillance video, WPIX reported.

That led police to a "known" 15-year-old in the neighborhood, according to WPIX sources.

He was arrested early Tuesday, and charged with attempted rape, burglary, and aggravated sex abuse, police said. The teen has not been identified.